Machine for applying lead heads to nails.



M. F. TUGULET.

MACHINE FOR APPLYING LEAD HEADS T0 NAILS.

APPLICATION FILED AUG. 5, 1913.

3 SHEETS-SHEET 1.

THE NORRIS PETERS Ca. PHOYDVLITHOV, WASHINGYGN. D C

M. F. TUGULET.

MACHINE FOR APPLYING'LEAD HEADS T0 NAILS.

APPLICATION FILED AUG. 5, 1913.

1,1 18,706. e d N v-24,1914.

3 SHEETS-SHEET 2.

THE NORRIS PETERS 00.. PHOTDJ-ITHQ. WASHING TON. D- C M. F. TUUULET.

MACHINE FOR APPLYING LEAD HEADS T0 NAILS.

APPLICATION FILED AUG. 5, 1913.

1 ,1 1 8,706. Patented Nov. 24, 191 1 3 SHEETS-SHEET 3.

wuewwom M/Mr/N fH/X 7561/15) 9 6543 alt ovum TED STATES PATENT onnron MARTIN FELIX TucULET, or BUENOS AIRES, ARGENTINA.

MACHINE FOR APPLYING LEAD HEADS TO NAILS.

Specification of Letters Patent.

Patented Nov. 24, 1914..

. Application filed August 5, 1913. Serial No. 783,006.

To all whom it may concern Be it known that I, MARTIN FELIX TUoU- LET, a manufacturer, citizen of Argentina, and residlng at No. 671, Calle Malpli, Buenos Aires, Argentina, have invented a novel Machine for Applying Lead Heads to Nails, of which the following is a specification. j

- Thepresent invention relates toa novel machine especially designed to staple cold lead heads on the ordinary tacks in order to prevent them. from rusting :and thereby greatly increasing their efliciency for se curing in placethe tin plates, galvanized iron, etc, from which roofs, and walls of warehouses, and other ordinary buildings areformed. M

It is well known that the provision of lead heads onthe nails to be employedfor the above purpose render the plates much a more lasting, as the hole made in the plate .is tightly 'closed due to the fact, not only of the greater diameter of the head ofthe nail but also to the adherence of the .material to the outer surface of the plate, thereby effectually preventing leakage.

As will be seen. further on, the machine according to the present invention permits the lead head to be quickly and readily applied to the nail head,so' that the latter is left completely inclosed in theilead head.

In order that the invention be more clearly understood, I append the annexed drawings in which,

Figure l is an elevation and front View of the essential parts of a machine lntended to stamp 1n cold lead heads on Paris nails,

constructed and disposed according to my present invention. Fig. 2 is a lateral projection of the same.

die or matrix. Fig. 4 is a vertical cross section which shows the matrix and female ma;

trix in the moment of stamping the lead head on an ordinary nail. e In the said drawings, 1 is the base plat secured to the rocker and on which is 56-.

cured the hollow member or counter-inatrix 2 by means of a nut 3. T On the plate 1 are mounted the bearings 4, in which are journaled the rollers 5 and 6, of which the roller 5 is plain and whose bearings are en gaged by set screws 7. The roller 6 is corrugated or roughened and its shaft 8 is extended and mounted in another bearing. Thisshaft 8 is provided with a spunwheel Fig. 3 is a plan projection of the clamp retaining the stamping 9 which is engaged by the tooth or doglO I held in engagement with said wheel by the spring 11. The dog and spring are secured to the lever 12, which is loosely mounted on the end of the shaft 8. ThlS lever-is actuated by a rocking lever 13, .i

which is mounted to oscillate on the pivot 14 and whichis provided with an elongated opening or slot, in which the pivot 15 of the member or. bridle 16, is adjustably mounted. The member or bridle 16 is actuated in its upper movement by a spring 17 and has mounted in its upper end an antifriction roller 19 on which the crank 20 operates. The said crank 20 is secured at the end of the shaft 21, which corresponds to the rocker. A strip of lead 22 fed from a reel conveniently arranged, after. passing through poles 23, passes through the guides 24:, whose position may be regulated by means of lateral screws 25, between the, rollers 5 and 6, and then into the channel 26. The said channel is pivotally supported at one end by the bearings 4, and its .other end is supported by means of a rod 27 upon which between the collar 29 and the base 30,

is mounted a spring 28,.the base 30 being held intposition by the bar 31, secured to the plate 1. At the upper part of the guide channel 26 there is formed a bridge under which thestrip of lead passes and which serves as a stop with which themathe die.or stamp to descend and force itscentral enlarged portion or collar intocontact with the internal face of the ring 36.

The main object of the said spring isto transmit to the die a force sufficient to cut theflanges formed by the excess of lead during the compression, which excess is discharged by the oppositely arranged holes 39 in the matrix holder and the ring 36. At the moment of compression the enlarged portion or collar of the die has been moved againstthe action of the spring 37, into engagement .withthe .shoulder .40 of the matrix holder and the die stamps the lead head on that of the nail 41.

The working of the machine takes place as follows. As it has been stated, the roller or hammer 34 is moved by an ordinary rocking mechanism or by any other convenient means. The workman feeds a nail on the counter-matrix 2 and immediately starts the rocker, thereby producing the descent of the hammer and consequently that of the die. At the exact moment when the said hammer 3st begins its descent, the crank moves the member or bridle 16, downward which by means of the levers 12 and 13 and the dog 10 turns the spur wheel 9 and thereby the shaft 8, and the roller 6 which causes the advance of the lead strip 22 and projects' its end beyond the end, of the guide channel-26 above the counter-matrix.

The portion of the lead which is located above the counter matrix is exactly the requisite amount for the formation of the head and there is no waste, except for the very small portions inclosed between each circular out, which portions can be recast and used, so that there is little or no waste. After the advancement of the leadstrip, the end of the lever 13 connected with the member or bridle 16 is raised and consequently, the opposed end is caused to descend, allowing the lever 12 to descend also by its own weight and to cause the dog to move into engagement with another tooth of the spur wheel 9. The arrangement has a great efficiency, due tothe fact that it automatically allows the strip of lead to be presented in front of the counter-matrix.

Once the nail has been introduced and the rocker started, the matrix descends and while continuing this movement reaches the bridge 32 of the guide channel guide 26,

forcing it to descend, but leaving between the ring 36 and the die 2 the portion of lead out by the latter. By the efi'ect of the descent of the matrix, the disk of lead is kept imprisoned between the matrix and die 38, but it does not suffer any deformation until the die 38, after overcoming the resistance I the stamped head nearly up to the outer of the spring 37 engages the shoulder 40 when it receives the impulse for compres sion and the disk of lead takes the form of the dies central-concavity and is molded 'aroundthe entire nails head filling the whole space represented by the distance between the matrix and the die. The portion of .thelead not compressed about the head of the nail passes out through the orifices 39, leaving two flanges adhering to the formed head.

When the matrix is raised, the force of the spring 37 forces the die to descend causing it to cut the said flanges and to extract part of the ring 36. The small fraction of the finished nail which-does not pass out of the ring gives a sufficient retention to permit'the nail to be raised with the matrix and be extracted from the same. Nevertheless, the said retention does not interfere with the nail coming out by itself when withit drawn from the counter matrix, but if this should not occur, a small jar by the workman when introducing the next nail will be sufficient to remove it. The fall of the nail can not take place on thecounter matrix due to the fact that this latter and the matrix are placed with a certain inclination.

It will be readily understood that by means of the said machine I am enabled to stamp the lead head on the Paris nails with a speed, perfection and economy much greater than by the different methods of heat molding employed up to the present time for the purpose.

Having now fully described and ascera tained' the nature of my. said invention and the manner in which the same is to be performed, I declare that what I claim is:

1. A machine for applying lead heads toacting with the counter-matrix to cut a disk I of lead from thestrip, of lead and a spring pressed die in the stamping matrix and com pressing the disk of lead out by the stamping. matrix about thexnail head while held. on

the counter-matrix and within the stamping" matrix.

2. A machine for applying lead heads to nails, comprising a counter-matrix, having, a central opening to receive a nail, means for feeding a strip of lead above the countermatrix, a reciprocating holder having lateral openings at, its lower'end, a stamping matrix having lateral openingsv registering with the openings of the holder, said matrix cooperating with the counter-matrix to cut adisk of lead from the strip of lead, and a spring pressed die in the holder and acting to compress the lead disk about the head of the nail while held on the counter-matrix and within the matrix of the holder.

3. A machine for applying lead heads to nails, comprising a counter-matrix having an opening to receive a nail, a pivoted guide extending adjacent to the counter-matrix, means for feeding a strip of lead through: the'guide above the counter-matrix, a reciprocating holder adapted to depress the said guide in its descent. a matrix in the holder and cooperating with the counter-matrix to out a disk of lead from the strip of lead, and a spring pressed die in the holder and acting to compress the lead disk about. the nail head while held on the countermatrix-and within the. matrix of the said holder; err-1111a machine forapplying-lead; head's;

to nails, a counter-matrix having an opening to receive a nail, and means for feeding a strip of lead above the said counter-matrix, a reciprocating holder having a bore of two diameters, the larger bore being provided with lateral openings, an apertured ringheld in the large bore and having lateral openings registering with the openings of the holder, a die within the holder and having an intermediate enlarged portion adapted to engage the shoulder formed by the two bores of the holder, and a spring in the holder between the enlarged portion of the die and the end of the smaller bore of the holder.

5. In a machine for applying lead heads to nails, a reciprocating matrix and die, a counter-matrix below and concentrically in front of the reciprocating matrix and die, the said reciprocating matrix and die and the counter-matrix being held at an inclination to permit the nail to fall outside of the pointer, and means for feeding a strip of lead above the counter-matrix.

In testimony whereof I affix my signature in the presence of two witnesses.

MARTIN FELIX ,TUCULET.

Witnesses:

ANTONIO L. BELLA, E. Ruonnn.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. C. 

